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Recent questions and answers in Soil Mechanics
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1
GATE2020CE111
In a soil investigation work at a site, Standard Penetration Test (SPT) was conducted at every $1.5\:m$ interval upto $30\: m$ depth. At $3\:m$ depth, the observed number of hammer blows for three successive $150\:mm$ penetrations were $8,6$ and $9$,respectively. The SPT Nvalue at $3\:m$ depth, is $23$ $17$ $15$ $14$
asked
Feb 28
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce1
soilmechanics
geotechnicalengineering
spt
0
votes
0
answers
2
GATE2020CE122
In a drained triaxial compression test, a sample of sand fails at deviator stress of $150\:kPa$ under confining pressure of $50\:kPa$. The angle of internal friction (in degree, round off to the nearest integer) of the sample, is ______
asked
Feb 28
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce1
soilmechanics
geotechnicalengineering
characteristicsofsand
numericalanswers
0
votes
0
answers
3
GATE2020CE134
The total stress paths corresponding to different loading conditions, for a soil specimen under the isotropically consolidated stress state (O), are shown below ... $OPIII, OQII, ORI, OSIV$ $OPI, OQIII, ORII, OSIV$
asked
Feb 28
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce1
soilmechanics
geotechnicalengineering
stresspaths
0
votes
0
answers
4
GATE2020CE153
A gaseous chemical has a concentration of $41.6\:\mu mol/m^3$ in air at $1$ atm pressure and temperature $293\:K$. The universal gas constant $R$ is $82.05\times10^{6}\;(m^3\:atm)/(mol\:K)$. Assuming that ideal gas law is valid , the concentration of the gaseous chemical (in ppm, round off to one decimal place), is ______.
asked
Feb 28
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce1
soilmechanics
geotechnicalengineering
upliftpressure
temperature
numericalanswers
0
votes
0
answers
5
GATE2020 CE26
The state of stress represented by Mohr’s circle shown in the figure is uniaxial tension biaxial tension of equal magnitude hydrostatic stress pure shear
asked
Feb 13
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
soilmechanics
geotechnicalengineering
mohr'scircle
stresspaths
0
votes
0
answers
6
GATE2020 CE210
Soil deposit formed due to transportation by wind is termed as aeolian deposit alluvial deposit estuarine deposit lacustrine deposit
asked
Feb 13
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
soilmechanics
geotechnicalengineering
soilstructureandfabric
0
votes
0
answers
7
GATE2020 CE222
A soil has dry unit weight of $15.5\: kN/m^3$, specific gravity of $2.65$ and degree of saturation of $72\: %.$ Considering the unit weight of water as $10\: kN/m^3$, the water content of the soil (in $\%$ round off to two decimal places) is __________.
asked
Feb 13
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
numericalanswers
soilmechanics
geotechnicalengineering
0
votes
0
answers
8
GATE2020 CE223
A onedimensional consolidation test is carried out on a standard $19\: mm$ thick clay sample. The oedometer’s deflection gauge indicates a reading of $2.1\: mm$, just before removal of the load, without allowing any swelling. The void ratio is $0.62$ at this stage. The initial void ratio (round off to two decimal places) of the standard specimen is __________.
asked
Feb 13
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
numericalanswers
soilmechanics
geotechnicalengineering
onedimensionalconsolidation
0
votes
0
answers
9
GATE2020 CE234
Permeability tests were carried out on the samples collected from two different layers as shown in the figure (not drawn to the scale). The relevant horizontal $(k_h)$ and vertical $(k_v)$ coefficients of permeability are indicated for each layer. The ratio of the equivalent horizontal to vertical coefficients of permeability, is $37.29$ $80.20$ $68.25$ $0.03$
asked
Feb 13
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
coefficientofpermeability
soilmechanics
geotechnicalengineering
0
votes
0
answers
10
GATE2020 CE247
A constanthead permeability test was conducted on a soil specimen under a hydraulic gradient of $2.5$. The soil specimen has specific gravity of $2.65$ and saturated water content of $20\%.$ If the coefficient of permeability of the soil is $0.1\: cm/s$, the seepage velocity (in $cm/s,$ round off to two decimal places) through the soil specimen is ________.
asked
Feb 13
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
numericalanswers
soilmechanics
geotechnicalengineering
coefficientofpermeability
0
votes
0
answers
11
GATE2020 CE248
A $5\: m$ high vertical wall has a saturated clay backfill. The saturated unit weight and cohesion of clay are $18\: kN/m^3$ and $20\: kPa$, respectively. The angle of internal friction of clay is zero. In order to prevent development of tension zone, the ... tension zone, the minimum height (in $m$, round off to one decimal place) by which the wall has to be raised, is ________.
asked
Feb 13
in
Soil Mechanics
by
jothee
(
2.7k
points)
gate2020ce2
numericalanswers
soilmechanics
geotechnicalengineering
0
votes
0
answers
12
2015 gate mcq true or false type
State true statement for degree of disturbance of collected soil sample
asked
Dec 19, 2019
in
Soil Mechanics
by
Pratikshanere
(
120
points)
0
votes
0
answers
13
GATE2017 CE24
Let $G$ be the specific gravity of soil solids, $w$ the water content in the soil sample, $\gamma_w$ the unit weight of water, and $\gamma_d$ ... $\gamma_d = \dfrac{Gw}{1 + \gamma_w} \\$ $\gamma_d = \dfrac{Gw}{1  \gamma_w}$
asked
Aug 7, 2019
in
Soil Mechanics
by
gatecse
(
3.9k
points)
gate2017ce2
soilmechanics
geotechnicalengineering
0
votes
0
answers
14
GATE2017 CE224
The infiltration capacity of a soil follows the Horton's exponential model, $f=c_1+c_2e^{kt}$. During an experiment, the initial infiltration capacity was observed to be $200$ mm/h. After a long time, the infiltration capacity was reduced $25$ mm/h. If the filtration capacity ... $k$ (in $h^{1}$, up to two decimal places) is ________
asked
Aug 7, 2019
in
Soil Mechanics
by
gatecse
(
3.9k
points)
gate2017ce2
numericalanswers
soilmechanics
geotechnicalengineering
0
votes
0
answers
15
GATE2017 CE235
Following are the statements related to the stress paths in a triaxial testing of soils: If $\sigma_1 = \sigma_3$, the stress point lies at the origin of the $pq$ plot If $\sigma_1 = \sigma_3$, the stress point lies on the $p$axis of the $pq$ plot If $\sigma_1 > \sigma_3$, ...  True P  True; Q  False; R  True P  False; Q  True; R  False P  True; Q  False; R  False
asked
Aug 7, 2019
in
Soil Mechanics
by
gatecse
(
3.9k
points)
gate2017ce2
soilmechanics
geotechnicalengineering
stresspaths
0
votes
0
answers
16
GATE2019 CE1: 16
A retaining wall of height $H$ with smooth vertical backface supports a backfill inclined at an angle $\beta$ with the horizontal. The backfill consists of cohesionless soil having angle of internal friction $\phi$. If the active lateral thrust acting on the wall is $P_a$ ... $P_a$ acts at a height $H/3$ from the base of the wall and at an angle $\phi$ with the horizontal
asked
Feb 14, 2019
in
Soil Mechanics
by
Arjun
(
2.8k
points)
gate2019ce1
soilmechanics
geotechnicalengineering
0
votes
0
answers
17
GATE2019 CE1: 17
In a soil specimen, the total stress, effective stress, hydraulic gradient and critical hydraulic gradient are $\sigma, \: \sigma’$, $i$ and $i_c$, respectively. For initiation of quicksand condition, which one of the following statements is TRUE? $\sigma’ \neq 0$ and $i=i_c$ $\sigma’ = 0$ and $i=i_c$ $\sigma’ \neq 0$ and $i \neq i_c$ $\sigma = 0$ and $i=i_c$
asked
Feb 14, 2019
in
Soil Mechanics
by
Arjun
(
2.8k
points)
gate2019ce1
soilmechanics
geotechnicalengineering
quicksandcondition
0
votes
0
answers
18
GATE2019 CE1: 24
A soil has specific gravity of its solids equal to $2.65$. The mass density of water is $1000 \: kg/m^3$. Considering zero air voids and $10 \%$ moisture content of the soil sample, the dry density (in $kg /m^3$, round off to $1$ decimal place) would be ______
asked
Feb 14, 2019
in
Soil Mechanics
by
Arjun
(
2.8k
points)
gate2019ce1
numericalanswers
soilmechanics
geotechnicalengineering
0
votes
0
answers
19
GATE2019 CE1: 25
A concentrated load of $500 \: kN$ is applied on an elastic half space. The ratio of the increase in vertical normal stress at depths of $2 \: m$ and $4 \: m$ along the point of the loading, as per Boussinesq’s theory, would be _____
asked
Feb 14, 2019
in
Soil Mechanics
by
Arjun
(
2.8k
points)
gate2019ce1
numericalanswers
foundationengineering
geotechnicalengineering
boussinesqstheory
0
votes
0
answers
20
GATE2019 CE1: 29
For the following statements: P  The lateral stress in the soil while being tested in an oedometer is always atrest. Q  For a perfectly rigid strip footing at deeper depths in a sand deposit, the vertical normal contact stress at the footing edge is greater than that at its centre. R  ... FALSE; Q  FALSE; R  TRUE P  TRUE; Q  TRUE; R  FALSE P  FALSE; Q  FALSE; R  FALSE
asked
Feb 14, 2019
in
Soil Mechanics
by
Arjun
(
2.8k
points)
gate2019ce1
soilmechanics
geotechnicalengineering
0
votes
0
answers
21
GATE2019 CE1: 53
A granular soil has a saturated unit weight of $20 \:kN/m^3$ and an effective angle of shearing resistance of $30^{\circ}$. The unit weight of water is $9.81 \: kN/m^3$. A slope is to be made on this soil deposit in which the seepage occurs ... seepage condition for a factor of safety of $1.5$, the safe slope angle (in degree, round off to $1$ decimal place) would be ________
asked
Feb 14, 2019
in
Soil Mechanics
by
Arjun
(
2.8k
points)
gate2019ce1
numericalanswers
soilmechanics
geotechnicalengineering
seepagethroughsoils
0
votes
0
answers
22
GATE2019 CE2: 51
The dimensions of a soil sampler are given in the table. ... $2$ decimal places) is ______________
asked
Feb 12, 2019
in
Soil Mechanics
by
Arjun
(
2.8k
points)
gate2019ce2
numericalanswers
soilmechanics
0
votes
0
answers
23
GATE2016213
The results of a consolidation test on an undisturbed soil, sampled at a depth of $10 \: m$ ... weight of water as $10 \: kN/m^3$, the overconsolidation ratio of the soil is $0.67$ $1.50$ $1.77$ $2.00$
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce2
soilmechanics
geotechnicalengineering
consolidation
0
votes
0
answers
24
GATE2016218
A water supply board is responsible for treating $1500 \:m^3/day$ of water. A settling column analysis indicates that an overflow rate of $20 \: m/day$ will produce satisfactory removal for a depth of $3.1 \: m$. It is decided to have two circular settling tanks in parallel. The required diameter (expressed in $m$) of the settling tank is __________
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce2
numericalanswers
foundationengineering
geotechnicalengineering
settlementanalysis
0
votes
0
answers
25
GATE2016220
The sound pressure (expressed in $\mu P a$) of the faintest sound that a normal healthy individual can hear is $0.2$ $2$ $20$ $55$
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce2
soilmechanics
geotechnicalengineering
soundpressure
0
votes
0
answers
26
GATE2016240
The seepage occurring through an earthen dam is represented by a flownet comprising of $10$ equipotential drops and $20$ flow channels. The coefficient of permeability of the soil is $3 \: mm/min$ and the head loss is $5 \: m$. The rate of seepage (expressed in $cm^3/s$ per $m$ length of the dam) through the earthen dam is _________
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce2
numericalanswers
soilmechanics
geotechnicalengineering
seepage
coefficientofpermeability
0
votes
0
answers
27
GATE2016243
Water flows from P to Q through two soil samples, Soil $1$, Soil $2$, having cross sectional area of $80 \: cm^2$ as shown in the figure. Over a period of $15$ minutes, $200$ ml of water was observed to pass through any crosssection. The flowconditions ... of permeability of Soil $1$ is $0.02$ mm/s, the coefficient of permeability of Soil $2$ (expressed in mm/s) would be _________
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce2
numericalanswers
soilmechanics
geotechnicalengineering
permeabilityonedimensionalflow
0
votes
0
answers
28
GATE2016249
A tracer takes $100$ days to travel from Well$1$ to Well$2$ which are $100 \: m$ apart. The elevation of water surface in Well$2$ is $3 \: m$ below that in Well$1$. Assuming porosity equal to $15 \%$, the coefficient of permeability (expressed in $m/day$) is $0.30$ $0.45$ $1.00$ $5.00$
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce2
soilmechanics
geotechnicalengineering
coefficientofpermeability
0
votes
0
answers
29
GATE2016111
In the consolidated undrained triaxial test on a saturated soil sample, the pore water pressure is zero during shearing stage only at the end of consolidation stage only both at the end of consolidation and during shearing stages under none of the above conditions
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce1
soilmechanics
geotechnicalengineering
0
votes
0
answers
30
GATE2016112
A fine grained soil is found to be plastic in the water content range of $26 – 48 \%$. As per Indian Standard Classification System, the soil is classified as CL CH CLML CI
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce1
soilmechanics
geotechnicalengineering
grainedsoil
indianstandardsoilclassificationsystem
0
votes
0
answers
31
GATE2016113
A vertical cut is to be made in a soil mass having cohesion $c$, angle of internal friction $\phi$, and unit weight $\gamma$. Considering $K_a$ and $K_p$ ... $\dfrac{4c \sqrt{K_a}}{\gamma } \\$ $\dfrac{4c}{\gamma \sqrt{K_a}}$
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce1
soilmechanics
geotechnicalengineering
0
votes
0
answers
32
GATE2016140
The porosity (n) and the degree of saturation (S) of a soil sample are $0.7$ and $40 \%$ respectively. In a $100\:m^3$ volume of the soil, the volume (expressed in $m^3$) of air is __________
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce1
numericalanswers
soilmechanics
geotechnicalengineering
0
votes
0
answers
33
GATE2016141
A homogeneous gravity retaining wall supporting a cohesionless backfill is shown in the figure. The lateral active earth pressure at the bottom of the wall is $40$ kPa. The minimum weight of the wall (expressed in kN per m length) required to prevent it from overturning about its toe (Point $\color{Red}{P}$) is $120$ $180$ $240$ $360$
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce1
soilmechanics
geotechnicalengineering
0
votes
0
answers
34
GATE2016142
An undisturbed soil sample was taken from the middle of a clay layer (i.e., $1.5$ ... level. Assuming unit weight of water as $10 kN/m^3$, the ultimate consolidation settlement (expressed in mm) of the clay layer is _______
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce1
numericalanswers
soilmechanics
geotechnicalengineering
undisturbedsoilsample
0
votes
0
answers
35
GATE2016143
A seepage flow condition is shown in the figure. The saturated unit weight of the soil $\gamma_{sat}=18 \: kN/m^3$. Using unit weight of water, $\gamma_w=9.81 \: kN/m^3$, the effective vertical stress (expressed in $kN/m^2$) on plane $XX$ is _______
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce1
numericalanswers
soilmechanics
geotechnicalengineering
seepageflow
0
votes
0
answers
36
GATE2016144
A drained triaxial compression test on a saturated clay yielded the effective shear strength parameters as $c’=15$ kPa and $\phi’=22^{\circ}$. Consolidated Undrained triaxial test on an identical sample of this clay at a cell pressure of $200$ kPa developed a pore water pressure of $150$ kPa at failure. The deviator stress (expressed in kPa) at failure is ________
asked
Mar 28, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2016ce1
numericalanswers
soilmechanics
geotechnicalengineering
shearstrengthparameters
0
votes
0
answers
37
GATE2017 CE1: 8
Group I lists the type of gain or loss of strength in soils. Group II lists the property or process responsible for the loss or gain of strength in soils. ... $P3, \: Q2; \: R1, \: S4$ $P4, \: Q2; \: R1, \: S3$
asked
Mar 26, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2017ce1
soilmechanics
geotechnicalengineering
strengthinsoils
0
votes
0
answers
38
GATE2017 CE1: 9
A soil sample is subjected to a hydrostatic pressure, $\sigma$. The Mohr circle for any point in the soil sample would be a circle of radius $\sigma$ and center at the origin a circle of radius $\sigma$ and center at a distance $\sigma$ from the origin a point at a distance $\sigma$ from the origin a circle of diameter $\sigma$ and center at the origin
asked
Mar 26, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2017ce1
soilmechanics
geotechnicalengineering
mohrcircle
0
votes
0
answers
39
GATE2017 CE1: 36
The laboratory tests on a soil sample yields the following results: natural moisture content $=18 \%$, liquid limit $=60 \%$, plastic limit $=25 \%$, percentage of clay sized fraction $=25\%$. The liquidity index and activity (as per the expression proposed by Skempton) of the soil, respectively, are $0.2$ and $1.4$ $0.2$ and $1.4$ $1.2$ and $0.714$ $1.2$ and $0.714$
asked
Mar 26, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2017ce1
soilmechanics
geotechnicalengineering
liquidityindex
0
votes
0
answers
40
GATE2015212
If the water content of a fully saturated soil mass is $100\%$, the void ratio of the sample is: less than specific gravity of soil equal to specific gravity of soil greater than specific gravity of soil independent of specific gravity of soil
asked
Mar 26, 2018
in
Soil Mechanics
by
Milicevic3306
(
11.9k
points)
gate2015ce2
soilmechanics
geotechnicalengineering
saturaedsoilmass
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